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Radeon HD 4870 X2 vs Radeon RX 480

Intro

The Radeon HD 4870 X2 features core clock speeds of 750 MHz on the GPU, and 900 MHz on the 1024 MB of GDDR5 RAM. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon RX 480, which has a core clock frequency of 1120 MHz and a GDDR5 memory speed of 2000 MHz. It also features a 256-bit bus, and makes use of a 14 nm design. It is made up of 2304 SPUs, 144 TAUs, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 480 150 Watts
Radeon HD 4870 X2 350 Watts
Difference: 200 Watts (133%)

Memory Bandwidth

The Radeon RX 480 should in theory be a small bit faster than the Radeon HD 4870 X2 in general. (explain)

Radeon RX 480 262144 MB/sec
Radeon HD 4870 X2 230400 MB/sec
Difference: 31744 (14%)

Texel Rate

The Radeon RX 480 will be a lot (more or less 169%) faster with regards to AF than the Radeon HD 4870 X2. (explain)

Radeon RX 480 161280 Mtexels/sec
Radeon HD 4870 X2 60000 Mtexels/sec
Difference: 101280 (169%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon RX 480 is the winner, by a large margin. (explain)

Radeon RX 480 35840 Mpixels/sec
Radeon HD 4870 X2 24000 Mpixels/sec
Difference: 11840 (49%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 480

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 4870 X2 Radeon RX 480
Manufacturer AMD AMD
Year Aug 12, 2008 June 2016
Code Name R700 Polaris 10
Memory 1024 MB (x2) 8192 MB
Core Speed 750 MHz (x2) 1120 MHz
Memory Speed 3600 MHz (x2) 8000 MHz
Power (Max TDP) 350 watts 150 watts
Bandwidth 230400 MB/sec 262144 MB/sec
Texel Rate 60000 Mtexels/sec 161280 Mtexels/sec
Pixel Rate 24000 Mpixels/sec 35840 Mpixels/sec
Unified Shaders 800(160x5) (x2) 2304
Texture Mapping Units 40 (x2) 144
Render Output Units 16 (x2) 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit (x2) 256-bit
Fab Process 55 nm 14 nm
Transistors 956 million 5700 million
Bus PCIe 2.0 x16 (PCIe bridge) PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12.0
OpenGL Version OpenGL 3.0 OpenGL 4.5

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be moved across the external memory interface in a second. It is calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon HD 4870 X2

Amazon.com

Check prices at:

Radeon RX 480

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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